City Heights CO and PM2.5 Data Analysis Report - Air Pollution ...

City Heights CO and PM2.5
Data Analysis Report
Bill Brick – Senior Meteorologist
San Diego Air Pollution Control District
May 26, 2009

Parameter
Location
Start Date
End Date
Comments
CO
SW Corner Teralta Park
November 1, 2008
December 13, 2008
CO
Central Elementary
December 22, 2008
January 30, 2009
PM2.5 (EBAM)
Central Elementary
December 18, 2008
February 4, 2009
PM2.5 (EBAM)
Wilson Middle School
December 16, 2008
February 4, 2009
PM2.5 (FRM)
Central Elementary
December 20, 2008
January 29, 2009
January 13 Missing
Meteorology
Central Elementary
November 19, 2008
February 4, 2009

Location
Latitude
Longitude
Elevation (ft MSL)
SW Corner Teralta Park CO
32° 45’ 05” N
117° 06’ 33” W
369
Central Elementary CO
32° 45’ 03” N
117° 06’ 29” W
367
Central Elementary PM2.5
(EBAM and FRM)
32° 45’ 03” N
117° 06’ 29” W
367
Wilson Middle School PM2.5
(EBAM)
32° 45’ 15” N
117° 06’ 39” W
375
Central Elementary
Meteorological Station
32° 45’ 04” N
117° 06’ 29” W
368

Carbon Monoxide Standards
California Standards
Federal Standards
1-Hour
8-Hour
20 ppm
9.0 ppm
35 ppm
9 ppm

Hourly CO Data for: Sunday, 1/18/2009
CO (ppm)
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
CVA
DTN
ESC
OTM
TEP/CES
1-Hr CO State Std
1-Hr CO Federal Std
Hour (PST)

Carbon Monoxide Statistics
CVA
DTN
ESC
OTM
TEP/CES
1-hour Maximum (ppm)
2.5
4.0
4.4
4.6
3.1
Average (ppm)
0.7
1.0
0.9
0.9
0.8

San Diego Hourly CO Data Averages by Hour:
November 1, 2008, through January 30, 2009
CO (ppm)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
CVA
DTN
ESC
OTM
TEP/CES
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

San Diego Hourly CO Data Averages by Hour:
November 1, 2008, through December 13, 2008
CO (ppm)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
CVA
DTN
ESC
OTM
TEP
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

San Diego Hourly CO Data Averages by Hour:
December 22, 2008, through January 30, 2009
CO (ppm)
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)
CVA
DTN
ESC
OTM
CES

San Diego Hourly CO Data Averages by Hour (interpolated):
November 1, 2008, through January 30, 2009
CO (ppm)
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)
TEP
CES

Hourly CO Data for: Wednesday, 12/31/2008
CO (ppm)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
CVA
DTN
ESC
OTM
TEP/CES
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

Hourly CO Data for: Thursday, 1/1/2009
CO (ppm)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
CVA
DTN
ESC
OTM
TEP/CES
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

TEP/CES CO Averages by Day of Week:
November 1, 2008 through January 30, 2009
CO (ppm)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Mon
Tue
Wed
Thu
Fri
Sat
Sun
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

TEP/CES CO Averages by Day of Week (without New Year's
Eve and New Year's Day):
November 1, 2008 through January 30, 2009
CO (ppm)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)
Mon
Tue
Wed
Thu
Fri
Sat
Sun

PM2.5 Standards
California Standards
Federal Standards
24-Hour
Annual Arithmetic Mean
No separate State Standard
12 µg/m3
35 µg/m3
15.0 µg/m3

Central Elementary School: FRM vs. EBAM
December 20, 2008, through January 29, 2009
60.0
50.0
PM2.5 (µg/m3)
40.0
30.0
20.0
FRM
EBAM
24-Hr Standard
10.0
0.0
Date

Date
CES
FRM
CES
EBAM
WMS
EBAM
12/20/2008 16.7 18.1 17.1
12/21/2008 27.9 28.4 30.2
12/22/2008 22.6 19.1 27.1
12/23/2008 8.2 8.1 8.4
12/24/2008 9.8 10.7 11.6
12/25/2008 5.1 5.0 7.7
12/26/2008 7.7 8.6 8.9
12/27/2008 10.1 9.7 10.2
12/28/2008 12.6 16.3 16.1
12/29/2008 9.7 12.0 14.2
12/30/2008 20.1 24.5 19.5
12/31/2008 29.0 38.3 32.0
1/1/2009 42.4 58.5 45.3
1/2/2009 38.1 37.7 30.9
1/3/2009 10.2 14.1 8.1
1/4/2009 15.2 17.6 15.2
1/5/2009 9.6 12.7 10.6
1/6/2009 9.9 11.1 9.6
1/7/2009 21.5 31.8 37.4
1/8/2009 29.7 38.7 35.8
1/9/2009 31.3 27.0 23.4
1/10/2009 9.8 11.3 7.9
1/11/2009 9.4 11.9 9.7
1/12/2009 4.6 3.5 3.2
1/13/2009 -999.0 5.3 13.7
1/14/2009 5.2 3.4 4.8
1/15/2009 7.8 7.2 9.2
1/16/2009 5.9 5.0 5.5
1/17/2009 6.2 6.4 6.4
1/18/2009 7.7 9.5 6.6
1/19/2009 6.9 7.8 6.0
1/20/2009 9.6 11.0 12.5
1/21/2009 14.8 14.2 13.7
1/22/2009 12.5 14.2 13.5
1/23/2009 8.1 11.7 10.3
1/24/2009 4.5 6.4 6.4
1/25/2009 5.5 7.9 7.3
1/26/2009 7.0 6.6 7.5
1/27/2009 7.0 7.2 9.1
1/28/2009 6.7 8.2 8.5
1/29/2009 5.4 7.1 5.2

San Diego County BAM and EBAM Data:
December 16, 2008, through February 3, 2009
PM2.5 (µg/m3)
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
ALP
DTN
ECA
ESC
CMP
CES
WMS
24-Hr Standard
Date

PM2.5 Averages
ALP BAM DTN BAM ECA BAM ESC BAM CMP BAM CES EBAM WMS EBAM
Average 8.9 12.5 16.4 13.7* 10.8 14.4 12.9
Table 7.
PM2.5 (BAM and EBAM) averages for all hourly data collected from
December 16, 2008, through February 3, 2009. * The Escondido (ESC)
average is biased downward since the BAM unit lost data for December 26 –
29, 2008.

Central Elementary School and Wilson Middle School Hourly
PM2.5 Averages: December 16, 2008 through February 4, 2009
35.0
PM2.5 (µg/m3)
30.0
25.0
20.0
15.0
10.0
5.0
CES PM2.5
WMS PM2.5
0.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour (PST)

San Diego County FRM PM2.5 Data (Interpolated):
December 20, 2008, through January 29, 2009
70.0
PM2.5 (µg/m3)
60.0
50.0
40.0
30.0
20.0
10.0
0.0
CVA PM25
ECA PM25
ESC PM25
KMA PM25
DTN PM25
CES PM25
24-Hr Std
Date

Date
CVA
PM25
ECA
PM25
ESC
PM25
KMA
PM25
DTN
PM25
CES
PM25
12/20/2008 15.7 22.6 27.9 -980.0 17.6 16.7
12/21/2008 28.3 27.9
12/22/2008 -973.0 22.6
12/23/2008 6.1 -973.0 8.4 5.0 8.4 8.2
12/24/2008 13.7 9.8
12/25/2008 6.0 5.1
12/26/2008 8.0 16.2 14.7 5.4 8.0 7.7
12/27/2008 12.7 10.1
12/28/2008 13.7 12.6
12/29/2008 -999.0 -999.0 18.7 6.8 15.5 9.7
12/30/2008 19.9 20.1
12/31/2008 37.4 29.0
1/1/2009 43.7 56.5 64.9 -999.0 52.1 42.4
1/2/2009 42.4 38.1
1/3/2009 9.6 10.2
1/4/2009 12.0 17.2 12.0 12.5 16.2 15.2
1/5/2009 11.2 9.6
1/6/2009 11.7 9.9
1/7/2009 22.2 21.2 21.5 19.5 25.2 21.5
1/8/2009 28.9 29.7
1/9/2009 35.7 31.3
1/10/2009 8.6 11.2 1.9 3.8 14.8 9.8
1/11/2009 12.6 9.4
1/12/2009 9.5 4.6
1/13/2009 5.9 7.8 4.5 4.2 11.4 -999.0
1/14/2009 -999.0 5.2
1/15/2009 -999.0 7.8
1/16/2009 5.4 11.3 7.0 4.7 11.2 5.9
1/17/2009 12.2 6.2
1/18/2009 13.9 7.7
1/19/2009 6.4 9.4 7.5 5.5 12.6 6.9
1/20/2009 16.4 9.6
1/21/2009 18.6 14.8
1/22/2009 13.9 11.9 8.0 11.4 15.8 12.5
1/23/2009 7.9 8.1
1/24/2009 4.4 4.5
1/25/2009 5.4 7.7 5.6 4.8 6.2 5.5
1/26/2009 7.4 7.0
1/27/2009 8.6 7.0
1/28/2009 8.0 13.4 9.9 6.5 11.7 6.7
1/29/2009 8.7 5.4

Conclusions
‣ CO and PM2.5 exhibit similar patterns to other locations in San Diego
County, and the measured concentrations fall mid-range to other San Diego
sites for both pollutants.
‣ CO levels at all monitoring sites in San Diego, including City Heights, H
meet
all state and federal air quality standards (measured levels were e well below
the standards).
‣ CO measurements, in close proximity and on both sides of SR-15, found
concentrations that were less than other areas of the County where
population density, traffic, topography, and meteorology result in higher
concentrations.
‣ City Heights is in an area with adequate ventilation and without topography
for cold air to settle and trap pollutants in the surface layer. This
combination of meteorology and topography contributes to good air r quality
in City Heights.

Conclusions (continued)
‣ Based upon the official FRM sampling, the 24-hour PM2.5 standard was
exceeded in City Heights on two days during the study (New Year’s s Day
and the following day, when the highest particulate concentrations ns are
frequently measured in the County).
‣ City Heights had the lowest PM2.5 concentration of all monitoring g sites on
New Year’s s Day, when all sites in San Diego County exceeded the 24-hour
standard.
‣ The PM2.5 data collected at the City Heights’ locations exhibit similar
patterns to other areas of the County, with concentrations in City Heights
mirrored by concentrations in other locales. This indicates a strong s
correlation to atmospheric conditions and regional air quality patterns; p
not a
locally-based problem.

Conclusions (concluded)
‣ Similar to other locations in San Diego County, the daily PM2.5 averages in
City Heights are strongly influenced by night and morning concentrations,
where atmospheric stability plays and important role in surface
concentrations. During the day, when local traffic, and therefore emissions,
is highest, surface concentrations tend to be at their lowest point in the
diurnal cycle.
‣ The PM2.5 measurements in City Heights are consistent with longer-term
measurements in other monitoring sites in San Diego County, falling mid-
range between other locations. Along with the rest of San Diego County,
City Heights meets the federal air quality standards for PM2.5.